/**

* MojoSetup; a portable, flexible installation application.

*

* Please see the file LICENSE.txt in the source's root directory.

*

* This file written by Ryan C. Gordon.

*/

#ifndef _INCL_PLATFORM_H_

#define _INCL_PLATFORM_H_

#include "universal.h"

#ifdef __cplusplus

extern "C" {

#endif

// Caller must free returned string!

char *MojoPlatform_currentWorkingDir(void);

// Caller must free returned string!

char *MojoPlatform_homedir(void);

uint32 MojoPlatform_ticks(void);

// Make current process kill itself immediately, without any sort of internal

// cleanup, like atexit() handlers or static destructors...the OS will have

// to sort out the freeing of any resources, and no more code in this

// process than necessary should run. This function does not return. Try to

// avoid calling this.

void MojoPlatform_die(void);

// Delete a file from the physical filesystem. This should remove empty

// directories as well as files. Returns true on success, false on failure.

boolean MojoPlatform_unlink(const char *fname);

// Resolve symlinks, relative paths, etc. Caller free()'s buffer. Returns

// NULL if path couldn't be resolved.

char *MojoPlatform_realpath(const char *path);

// Create a symlink in the physical filesystem. (src) is the NAME OF THE LINK

// and (dst) is WHAT IT POINTS TO. This is backwards from the unix symlink()

// syscall! Returns true if link was created, false otherwise.

boolean MojoPlatform_symlink(const char *src, const char *dst);

// Read the destination from symlink (linkname). Returns a pointer

// allocated with xmalloc() containing the linkdest on success, and NULL

// on failure. The caller is responsible for freeing the returned pointer!

char *MojoPlatform_readlink(const char *linkname);

// !!! FIXME: we really can't do this in a 16-bit value...non-Unix platforms

// !!! FIXME: and Extended Attributes need more.

// Create a directory in the physical filesystem, with (perms) permissions.

// returns true if directory is created, false otherwise.

// Move a file to a new name. This has to be a fast (if not atomic) operation,

// so if it would require a legitimate copy to another filesystem or device,

// this should fail, as the standard Unix rename() function does.

// Returns true on successful rename, false otherwise.

boolean MojoPlatform_rename(const char *src, const char *dst);

// Determine if dir/fname exists in the native filesystem. It doesn't matter

// if it's a directory, file, symlink, etc, we're just looking for the

// existance of the entry itself. (fname) may be NULL, in which case,

// (dir) contains the whole path, otherwise, the platform layer needs to

// build the path: (on Unix: dir/path, on Windows: dir\\path, etc).

// This is a convenience thing for the caller.

// Returns true if path in question exists, false otherwise.

boolean MojoPlatform_exists(const char *dir, const char *fname);

// Returns true if (fname) in the native filesystem is writable. If (fname)

// is a directory, this means that the contents of the directory can be

// added to (create files, delete files, etc). If (fname) is a file, this

// means that this process has write access to the file.

// Returns false if (fname) isn't writable.

boolean MojoPlatform_writable(const char *fname);

// Returns true if (dir) is a directory in the physical filesystem, false

// otherwise (including if (dir) doesn't exist). Don't follow symlinks.

boolean MojoPlatform_isdir(const char *dir);

// Returns true if (fname) is a symlink in the physical filesystem, false

// otherwise (including if (fname) doesn't exist). Don't follow symlinks.

boolean MojoPlatform_issymlink(const char *fname);

// Returns true if stdin and stdout are connected to a tty.

boolean MojoPlatform_istty(void);

// Returns true if (fname) is a regular file in the physical filesystem, false

// otherwise (including if (fname) doesn't exist). Don't follow symlinks.

boolean MojoPlatform_isfile(const char *fname);

// Returns size, in bytes, of the file (fname) in the physical filesystem.

// Return -1 if file is missing or not a file. Don't follow symlinks.

int64 MojoPlatform_filesize(const char *fname);

// !!! FIXME: we really can't do this in a 16-bit value...non-Unix platforms

// !!! FIXME: and Extended Attributes need more.

// !!! FIXME: comment me.

boolean MojoPlatform_perms(const char *fname, uint16 *p);

// !!! FIXME: we really can't do this in a 16-bit value...non-Unix platforms

// !!! FIXME: and Extended Attributes need more.

// !!! FIXME: comment me.

boolean MojoPlatform_chmod(const char *fname, uint16 p);

// Try to locate a specific piece of media (usually an inserted CD or DVD).

// (uniquefile) is a path that should exist on the media; its presence

// should uniquely identify the media.

// Returns the path of the media's mount point in the physical filesystem

// (something like "E:\\" on Windows or "/mnt/cdrom" on Unix), or NULL if

// the media isn't found (needed disc isn't inserted, etc).

// Caller must free return value!

char *MojoPlatform_findMedia(const char *uniquefile);

// Flag values for MojoPlatform_fopen().

typedef enum

{

MOJOFILE_READ=(1<<0),

MOJOFILE_WRITE=(1<<1),

MOJOFILE_CREATE=(1<<2),

MOJOFILE_EXCLUSIVE=(1<<3),

MOJOFILE_TRUNCATE=(1<<4),

MOJOFILE_APPEND=(1<<5),

} MojoFileFlags;

typedef enum

{

MOJOSEEK_SET,

MOJOSEEK_CURRENT,

MOJOSEEK_END

} MojoFileSeek;

// !!! FIXME: we really can't do this in a 16-bit value...non-Unix platforms

// !!! FIXME: and Extended Attributes need more.

// Open file (fname). This wraps a subset of the Unix open() syscall. Use

// MojoFileFlags for (flags). If creating a file, use (mode) for the new

// file's permissions.

// Returns an opaque handle on success, NULL on error. Caller must free

// handle with MojoPlatform_close() when done with it.

// Return a handle that's compatible with MojoPlatform_open()'s return values

// that represents stdout. May return NULL for platforms that don't support

// this concept. You need to make sure that stdout itself doesn't really

// close in MojoPlatform_close(), at least for now.

void *MojoPlatform_stdout(void);

// Read (bytes) bytes from (fd) into (buf). This wraps the Unix read() syscall.

// Returns number of bytes read, -1 on error.

// Write (bytes) bytes from (buf) into (fd). This wraps the Unix write()

// syscall. Returns number of bytes read, -1 on error.

// Reports byte offset of file pointer in (fd), or -1 on error.

// Seek to (offset) byte offset of file pointer in (fd), relative to (whence).

// This wraps the Unix lseek() syscall. Returns byte offset from the start

// of the file, -1 on error.

// Get the size, in bytes, of a file, referenced by its opaque handle.

// (This pulls the data through an fstat() on Unix.) Retuns -1 on error.

// Force any pending data to disk, returns true on success, false if there

// was an i/o error.

boolean MojoPlatform_flush(void *fd);

// Free any resources associated with (fd), flushing any pending data to disk,

// and closing the file. (fd) becomes invalid after this call returns

// successfully. This wraps the Unix close() syscall. Returns true on

// success, false on i/o error.

boolean MojoPlatform_close(void *fd);

// Enumerate a directory. Returns an opaque pointer that can be used with

// repeated calls to MojoPlatform_readdir() to enumerate the names of

// directory entries. Returns NULL on error. Non-NULL values should be passed

// to MojoPlatform_closedir() for cleanup when you are done with them.

void *MojoPlatform_opendir(const char *dirname);

// Get the next entry in the directory. (dirhandle) is an opaque pointer

// returned by MojoPlatform_opendir(). Returns NULL if we're at the end of

// the directory, or a null-terminated UTF-8 string otherwise. The order of

// results are not guaranteed, and may change between two iterations.

// Caller must free returned string!

char *MojoPlatform_readdir(void *dirhandle);

// Clean up resources used by a directory enumeration. (dirhandle) is an

// opaque pointer returned by MojoPlatform_opendir(), and becomes invalid

// after this call.

void MojoPlatform_closedir(void *dirhandle);

// in the future, and other platforms may need to interpret permissions

// differently. (str) may be NULL for defaults, and is considered valid.

// If (str) is not valid, return a reasonable default and set (*valid) to

// false. Otherwise, set (*valid) to true and return the converted value.

uint16 MojoPlatform_makePermissions(const char *str, boolean *valid);

// Return a default, sane set of permissions for a newly-created file.

uint16 MojoPlatform_defaultFilePerms(void);

// Return a default, sane set of permissions for a newly-created directory.

uint16 MojoPlatform_defaultDirPerms(void);

// Wrappers for Unix dlopen/dlsym/dlclose, sort of. Instead of a filename,

// these take a memory buffer for the library. If you can't load this

// directly in RAM, the platform should write it to a temporary file first,

// and deal with cleanup in MojoPlatform_dlclose(). The memory buffer must be

// dereferenced in MojoPlatform_dlopen(), as the caller may free() it upon

// return. Everything else works like the usual Unix calls.

void *MojoPlatform_dlopen(const uint8 *img, size_t len);

void *MojoPlatform_dlsym(void *lib, const char *sym);

void MojoPlatform_dlclose(void *lib);

// Launch the user's preferred browser to view the URL (url).

// Returns true if the browser launched, false otherwise. We can't know

// if the URL actually loaded, just if the browser launched. The hope is that

// the browser will inform the user if there's a problem loading the URL.

boolean MojoPlatform_launchBrowser(const char *url);

// Add a menu item to the Application menu or Start bar or whatever.

// (data) is 100% platform dependent right now, and this interface will

// likely change as we come to understand various systems' needs better.

// On Unix, it expects this to be a path to a FreeDesktop .desktop file.

// Returns (true) on success and (false) on failure.

boolean MojoPlatform_installDesktopMenuItem(const char *data);

// Remove a menu item from the Application menu or Start bar or whatever.

// (data) is 100% platform dependent right now, and this interface will

// likely change as we come to understand various systems' needs better.

// On Unix, it expects this to be a path to a FreeDesktop .desktop file.

// Returns (true) on success and (false) on failure.

boolean MojoPlatform_uninstallDesktopMenuItem(const char *data);

#if !SUPPORT_MULTIARCH

#define MojoPlatform_switchBin(img, len)

#else

void MojoPlatform_switchBin(const uint8 *img, size_t len);

#endif

// Try to spawn a terminal, and relaunch MojoSetup within it.

// Does not return on success (process replaces itself).

void MojoPlatform_spawnTerminal(void);

// Put the calling process to sleep for at least (ticks) milliseconds.

// This is meant to yield the CPU while spinning in a loop that is polling

// for input, etc. Pumping the GUI event queue happens elsewhere, not here.

void MojoPlatform_sleep(uint32 ticks);

// Put a line of text to the the system log, whatever that might be on a

// given platform. (str) is a complete line, but won't end with any newline

// characters. You should supply if needed.

void MojoPlatform_log(const char *str);

// This tries to decode a graphic file in memory into an RGBA framebuffer.

// Most platforms return NULL here. No one should call this; use decodeImage()

// instead, which will try included platform-independent code if this fails.

// This function is just here to allow a platform with the appropriate

// functionality to work without compiling in stb_image.c, or supply more

// formats over the built-in code.

// (data) points to the compressed data, (size) is the number of bytes

// of compressed data. (*w) and (*h) will contain the images dimensions on

// return.

// Returns NULL on failure (unsupported, etc) and a pointer to the

// uncompressed data on success. Caller must free() the returned pointer!

uint8 *MojoPlatform_decodeImage(const uint8 *data, uint32 size,

uint32 *w, uint32 *h);

// Get the current locale, in the format "xx_YY" where "xx" is the language

// (en, fr, de...) and "_YY" is the country. (_US, _CA, etc). The country

// can be omitted. Don't include encoding, it's always UTF-8 at this time.

// Returns locale string, or NULL if it couldn't be determined.

// Caller must free() the returned pointer!

char *MojoPlatform_locale(void);

// !!! FIXME: document me.

// Caller must free() the returned pointer!

char *MojoPlatform_osType(void);

// !!! FIXME: document me.

// Caller must free() the returned pointer!

char *MojoPlatform_osVersion(void);

// !!! FIXME: document me.

uint64 MojoPlatform_getuid(void);

// !!! FIXME: document me.

uint64 MojoPlatform_geteuid(void);

// !!! FIXME: document me.

uint64 MojoPlatform_getgid(void);

// Basic platform detection.

#if PLATFORM_WINDOWS

#define PLATFORM_NAME "windows"

#elif PLATFORM_MACOSX

#define PLATFORM_NAME "macosx"

#elif PLATFORM_UNIX

#define PLATFORM_NAME "unix"

#elif PLATFORM_BEOS

#define PLATFORM_NAME "beos"

#endif

// Basic architecture detection.

#if defined(__powerpc64__)

#define PLATFORM_ARCH "powerpc64"

#elif defined(__ppc__) || defined(__powerpc__) || defined(__POWERPC__)

#define PLATFORM_ARCH "powerpc"

#elif defined(__x86_64__) || defined(_M_X64)

#define PLATFORM_ARCH "x86-64"

#elif defined(__X86__) || defined(__i386__) || defined(i386) || defined (_M_IX86) || defined(__386__)

#define PLATFORM_ARCH "x86"

#else

#error Unknown processor architecture.

#endif

// Other basic truths...

#if PLATFORM_WINDOWS

#define MOJOPLATFORM_ENDLINE "\r\n"

#else

#define MOJOPLATFORM_ENDLINE "\n"

#endif

#ifdef __cplusplus

}

#endif

#endif